Drug delivery device

Electrical treatment apparatus for use with an associated molecule source, comprising:

• at least one electrode;
• a power source for electrifying said at least one electrode;
• and
• a controller, which is programmed to activate the power source to selectively electrify said at least one electrode to apply at least one electric field, said at least one electric field having a transport effect for transporting a molecule in a desired manner and a non-excitatory control effect, which does not induce an additional propagating action potential, for controlling the activity of at least a part of a non-cardiac excitable tissue, said programming selected to achieve a desired provision of said molecule into said at least a part of an excitable tissue or associated vasculature, said desired provision being at least assisted by an interaction between the transport effect and the control effect.